Book stand



FIG. 1 is a perspective view as viewed from the front of the book stand;

FIG. 2 is a perspective view as viewed from the rear;

FIG. 3 is a left side elevation view;

FIG. 4 is a front side elevation view;

FIG. 5 is a rear side elevation view;

FIG. 6 is a top plan view; and,

FIG. 7 is a bottom plan view.

The ornamental design for a book stand, as shown and described.